What the FDA labels say about taking them together
Gemfibrozil and rifampin
Gemfibrozil's FDA label of April 10, 2026 names rifampin in its drug interactions section; the rifampin label PlainMeds reads does not name gemfibrozil. The gemfibrozil label: “(D) OATP1B1 substrates: Gemfibrozil is an inhibitor of OATP1B1 transporter and may increase exposure of drugs that are substrates of OATP1B1.”
Check it at the source: the gemfibrozil FDA label on DailyMed (effective April 10, 2026, Northstar RxLLC); the rifampin FDA label on DailyMed (effective February 11, 2026, Lupin Pharmaceuticals, Inc.).
What does the gemfibrozil label say about rifampin?
Gemfibrozil label, drug interactions(D) OATP1B1 substrates: Gemfibrozil is an inhibitor of OATP1B1 transporter and may increase exposure of drugs that are substrates of OATP1B1 (e.g., atrasentan, atorvastatin, bosentan, ezetimibe, fluvastatin, glyburide, SN-38 [active metabolite of irinotecan], rosuvastatin, pitavastatin, pravastatin, rifampin, valsartan, olmesartan).
Source: FDA drug label (Gemfibrozil), Northstar RxLLC, effective April 10, 2026 (SPL set 75cac02c-56e3-4dfe-b1e2-4ce166b28833), via openFDA; the full label on DailyMed
What does the rifampin label say about gemfibrozil?
Rifampin's label (effective February 11, 2026) does not name gemfibrozil in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (rifampin), Lupin Pharmaceuticals, Inc., effective February 11, 2026 (SPL set b56004f0-f23d-47f6-80c7-39884fccbccc), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Gemfibrozil | Rifampin | |
|---|---|---|
| Labeled for | High cholesterol, Heart attack and coronary artery disease | n/a |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.104 per tablet 600 mg tablet | $0.679 per capsule 300 mg capsule |
| Shortage now | A presentation being discontinued | In shortage |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once